<template>
    <div>
        <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>权限管理</el-breadcrumb-item>
            <el-breadcrumb-item>角色列表</el-breadcrumb-item>
        </el-breadcrumb>
        <el-card>
            <el-row>
                <el-col>
                    <el-button type="primary">添加角色</el-button>
                </el-col>
            </el-row>
            <el-table :data="rolelist">
                <el-table-column type="expand">
                    <template slot-scope="scope">
                        <el-row :class="['vcenter','bdbottom', i1 === 0 ? 'bdtop':'']" :key="item1.id" v-for="(item1,i1) in scope.row.children">
                            <el-col :span="5">
                                <el-tag closable @close="removeRightById(scope.row,item1.id)">{{item1.authName}}</el-tag>
                                <i class="el-icon-caret-right"></i>
                            </el-col>
                            <el-col :span="19">
                                <el-row :class="'vcenter '+[i2!==0?'bdtop':'']" v-for="(item2,i2) in item1.children" :key="item2.id">
                                    <el-col :span="6">
                                        <el-tag closable @close="removeRightById(scope.row,item2.id)" type="success">{{item2.authName}}</el-tag>
                                        <i class="el-icon-caret-right"></i>
                                    </el-col>
                                    <el-col :span="18">
                                        <el-tag closable @close="removeRightById(scope.row,item3.id)" type="warning" v-for="item3 in item2.children" :key="item3.id">{{item3.authName}}</el-tag>
                                    </el-col>
                                </el-row>
                            </el-col>
                        </el-row>
                    </template>
                </el-table-column>
                <el-table-column type="index"></el-table-column>
                <el-table-column label="角色名称" prop="roleName"></el-table-column>
                <el-table-column label="角色描述" prop="roleName"></el-table-column>
                <el-table-column label="操作" width="300px">
                    <template slot-scope="scope">
                        <el-button size="mini" type="primary" icon="el-icon-edit">编辑</el-button>
                        <el-button size="mini" type="danger" icon="el-icon-delete">删除</el-button>
                        <el-button size="mini" type="warning" icon="el-icon-setting" @click="showSetRightDialog(scope.row)">分配权限</el-button>
                    </template>
                </el-table-column>
            </el-table>
        </el-card>

        <el-dialog
            title="分配权限"
            @close="setRightDialogClose"
            :visible.sync="setRightDialogVisible"
            width="50%">
            <el-tree :data="rightsList" 
            :props="treeProps" node-key="id"
            default-expand-all
            :default-checked-keys="defKeys"
            ref="treeRef"
            show-checkbox>
            </el-tree>
            <span slot="footer" class="dialog-footer">
                <el-button @click="setRightDialogVisible = false">取 消</el-button>
                <el-button @click="allotRights" type="primary">确 定</el-button>
            </span>
        </el-dialog>
    </div>
</template>
<script>
export default {
    data(){
        return{
            rolelist:[],
            setRightDialogVisible: false,
            rightsList:[],
            // 树形控件的属性绑定对象
            treeProps:{
                children:'children',
                label:'authName'
            },
            defKeys:[],
            roleId:''
        }
    },
    created(){
        this.getRolesList()
    },
    methods: {
        async getRolesList(){
            const { data: res } = await this.$http.get("roles")
            if(res.meta.status!==200) return this.$message.error("获取权限列表失败")
            this.rolelist = res.data
        },
        async removeRightById(role,rightId){
            const confirmResult = await this.$confirm('此操作将永久删除该权限, 是否继续?', '提示', {
                confirmButtonText: '确定',
                cancelButtonText: '取消',
                type: 'warning'
            }).catch(err=>err);
            if(confirmResult!=='confirm') return this.$message.info("取消了删除")
            const { data: res } = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
            if(res.meta.status!==200) return this.$message.error("删除权限失败")
            this.$message.success("删除权限成功")
            role.children = res.data
        },
        // 显示分配权限对话框
        async showSetRightDialog(role){
            // 保存当前分配角色的id
            this.roleId = role.id
            // 获取所有权限
            const { data : res } = await this.$http.get("rights/tree")
            if(res.meta.status!==200)   return this.$message.error("获取权限失败")
            this.rightsList = res.data
            // 递归获取三级权限的id
            this.getLeafKeys(role,this.defKeys)
            this.setRightDialogVisible = true

        },
        //递归获取默认三级权限的方法
        getLeafKeys(node,arr){
            if(!node.children)  return  arr.push(node.id)
            node.children.forEach(item => this.getLeafKeys(item,arr))
        },
        setRightDialogClose(){
            this.defKeys = []
        },
        async allotRights(){
            const keys = [
                ...this.$refs.treeRef.getCheckedKeys(),
                ...this.$refs.treeRef.getHalfCheckedKeys(),
            ]
            const idStr = keys.join(',')
            const { data : res } = await this.$http.post(`roles/${this.roleId}/rights`,{rids:idStr})
            if(res.meta.status!==200)   return this.$message.error("失败")
            this.$message.success("分配权限成功")
            this.getRolesList()
            this.setRightDialogVisible = false
        }
    }
}
</script>
<style scoped>
    .el-tag{
        margin: 7px;
    }
    .bdtop{
        border-top: 1px solid #eee;
    }
    .bdbottom{
        border-bottom: 1px solid #eee;
    }
    .vcenter{
        display:flex;
        align-items: center;
    }
</style>